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Sunita prepares some equipment for a class practical - Edexcel - GCSE Physics - Question 2 - 2012 - Paper 1
Question 2
Sunita prepares some equipment for a class practical. She uses a metre rule, some white card and the light from a distant window. Describe how she could measure the ... show full transcript
Worked Solution & Example Answer:Sunita prepares some equipment for a class practical - Edexcel - GCSE Physics - Question 2 - 2012 - Paper 1
Step 1
Describe how she could measure the focal length of a lens using this equipment.
Answer
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Set Up the Equipment: Place the lens in a horizontal position using a support stand, ensuring it's stable.
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Use the Metre Rule: Hold the white card at a fixed distance behind the lens to capture the projected image of a distant light source (e.g., sunlight).
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Adjust the Distance: Move the card back and forth until the image on the card is sharp and clear, indicating it is at the focal point.
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Measure the Distance: Record the distance from the lens to the card using the metre rule. This distance is the focal length of the lens.
Step 3